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This wall painting found in the Roman city of Pompeii is an example of a primary source about people in Pompeii in Roman times (portrait of Terentius Neo).. In the study of history as an academic discipline, a primary source (also called an original source) is an artifact, document, diary, manuscript, autobiography, recording, or any other source of information that was created at the time ...
Among genealogists, a primary source comes from a direct witness, a secondary source comes from second-hand information or hearsay told to others by witnesses, and tertiary sources can represent either a further link in the chain or an analysis, summary, or distillation of primary and/or secondary sources. In this system, an elderly woman's ...
Secondary or tertiary sources are needed to establish the topic's notability and to avoid novel interpretations of primary sources. All interpretive claims, analyses, or synthetic claims about primary sources must be referenced to a secondary source, rather than to an original analysis of the primary-source material by Wikipedia editors.
In theory, primary sources may also be used. Reliance on primary sources can lead to interpretive clambs, analyses, or synthetic claims, which must be referenced to a specific source that makes the same claim or analysis. It is not proper to rely on original analysis of the primary-source material by Wikipedia editors.
It remains a secondary source for it's analysis (although it might not be a good - or "useful" secondary source, because it probably is outdated, and has likely been superseded by more modern sources)... but it is also a primary source for an analysis of what scholarship said about the war, back in 1920. Regarding ancient sources...
Primary source Scientist publishes an original report about their experiments. Eyewitnesses at a house fire write about what they saw. Secondary source Scientist combines data from a dozen of their own previously published experiments into a meta-analysis. Author uses eyewitness reports to write a book about house fires. Tertiary source
Sources of information are commonly categorized as primary, secondary, or tertiary sources.In brief, a primary source is one close to the event with firsthand knowledge (for example, an eyewitness); a secondary source is at least one step removed (for example, a book about an event written by someone not involved in it); and a tertiary source is an encyclopaedia or textbook that provides a ...
If a large majority of sources are adamantly, confidently wrong, then we, as chroniclers of consensus, may have no option but to reflect that. This is a dicey topic. Wikipedia:Verifiability, not truth has been downgraded from policy to partial policy to essay, while at the same time words vaguely reflecting it remain in Wikipedia:Verifiability.